debugging a repeating panic that does not produce a dump

[Mike Tancsa]

I am seeing a repeatable panic with a 4.x SMP machine (not when in uni mode). It never produces a crash dump, but always panics when periodic runs. (started with a Jan 28th stable.
e.g.



Fatal trap 12: page fault while in kernel mode
mp_lock = 01000002; cpuid = 1; lapic.id = 00000000
fault virtual address = 0x211e6d36
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0174830
stack pointer = 0x10:0xde136c4c
frame pointer = 0x10:0xde136c58
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 8676 (find)
interrupt mask = none <- SMP: XXX
trap number = 12
panic: page fault
mp_lock = 01000002; cpuid = 1; lapic.id = 00000000
boot() called on cpu#1

syncing disks... 3 2
done
Uptime: 23h58m25s
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...
cpu_reset called on cpu#1
cpu_reset: Stopping other CPUs
cpu_reset: Restarting BSP
tpu_reset_proxy: Grabbed mp lock cfpor_ rBeSsPe
..not grab mp lock
Console: serial port
BIOS drive A: is disk0
BIOS drive C: is disk1
BIOS 629kB/785396kB available memory

mp_lock = 01000002; cpuid = 1; lapic.id = 00000000
fault virtual address = 0xfa401631
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0174830
stack pointer = 0x10:0xdf9d9c4c
frame pointer = 0x10:0xdf9d9c58
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 41326 (find)
interrupt mask = none <- SMP: XXX
trap number = 12
panic: page fault
mp_lock = 01000002; cpuid = 1; lapic.id = 00000000
boot() called on cpu#1

syncing disks... 5 2
done
Uptime: 1d2h51m37s
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...
cpu_reset called on cpu#1
cpu_reset: Stopping other CPUs
cpu_reset: Restarting BSP
cpu_reset_proxy: Grabbed mp lock cfpor BSPe
: BSP did not grab mp lock
Console: serial port
BIOS drive A: is disk0


Fatal trap 12: page fault while in kernel mode
mp_lock = 01000002; cpuid = 1; lapic.id = 00000000
fault virtual address = 0xc6941fe1
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc0174830
stack pointer = 0x10:0xdd9c6c4c
frame pointer = 0x10:0xdd9c6c58
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 85432 (find)
interrupt mask = none <- SMP: XXX
trap number = 12
panic: page fault
mp_lock = 01000002; cpuid = 1; lapic.id = 00000000
boot() called on cpu#1

syncing disks... 2 1
done
Uptime: 1d7h58m35s
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...
cpu_reset called on cpu#1
cpu_reset: Stopping other CPUs
cpu_reset: Restarting BSP
cpu_reset_proxy: Grabbed mp lock cpu_reset
: BSP did not grab mp lock
Console: serial port
BIOS drive A: is disk0


How can I best try and track / isolate this issue down ?

---Mike

--------------------------------------------------------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, [EMAIL PROTECTED]
Providing Internet since 1994 www.sentex.net
Cambridge, Ontario Canada www.sentex.net/mike


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